A high-profile Chicago attorney, on the legal team of the 20-year-old California woman who’s claiming Justin Bieber is the father of her 3-month-old son, told the Dr. Drew show on Tuesday that her lawyers attempted to contact Bieber’s lawyers before the case was filed, and never received a response.

Yeater’s team hoped to settle the case “outside of court,” said Jeffery Leving, a lawyer known for his work as an activist for father’s rights in divorce and custody cases.

Yeater claims — as first reported in Star magazine — she and Bieber had an unprotected, 30-second sexual encounter in a backstage bathroom at the Staples Center following an October 2010 concert. She said the tryst produced her son Tristyn Anthony Markhouse Yeater, who was born July 6.

Bieber told the Today Show last week he’s “never met” Yeater and that “none of these allegations are true.”

“I’m gonna be a target,” the 17-year-old Baby singer said, “but I’m never gonna be a victim.”